The proprietary,cross platform app uses the Internet to send text messages, images, video, user location and audio media messages
WhatsApp is supported on most Android, BlackBerry, iPhone, and Nokia smartphones. All Android phones running the Android 2.1 and above, all BlackBerry devices running OS 4.7 and later, including BlackBerry 10, and all iPhones running iOS 4.3 and later
WhatsApp Inc., was founded in 2009 by Brian Acton and Jan Koum, both former employees of Yahoo
WhatsApp was switched from a free to paid service to avoid growing too fast, mainly because the primary cost was sending verification texts to users. In December 2009 WhatsApp for the iPhone was updated to send photos. By early 2011, WhatsApp was in the top 20 of all apps in Apple's U.S. App Store
On February 19, 2014, months after a venture capital financing round at a $1.5 billion valuation,Facebook announced it was acquiring WhatsApp for US$19 billion, its largest acquisition to date.
In January 2015, WhatsApp was the most Globally Popular Messaging App with more than 600 million active users.In April 2015, WhatsApp reached 800 Million Active Users
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